In spite of these numerous attempts, however, only \(\approx 20\)  DLAs at redshift \(\gtrsim 2\) 
have been associated directly to counterparts in emission
[1]}. This low detection rate
could be attributed either to the faint nature of DLA galaxies (which
become difficult to image at close separation from bright background
quasars), or to their dusty nature, or to high H i column density, or
yet again to the fact that only a fraction of the DLA population is directly
connected to active star-formation.
